Gearing foe coifwecting feed ob pressure



To all whom t may concern:

UNITED STATE-js; PATENT oFFIcEt,

'o'.y W. BROWN AND w. E. OR'NELL, or BOSTON, MASSACHUSETTS.;

GEARING Een cNN'EcTING FEED on PRESSURE ROLLERS.

spea''cat'in of 'Eaters' Patent No. 5,191, date :ruiy 1'?, 1847.

Be it known that we, CHARLES BROWN Vand WILLIAM` E. CORNELL, of Boston, `in the county of Suffolk and State of Massachusetts, have invented newand useful Improvements in the Method of Arranging and Operating Feed and Pressure Rollers lof PlaningMachin'es, which improvementsaref applicable to other purposes, and that the following is a full, clear, and exact descrip tion of the principle or character which distinguishes them Vfrom all other thingsbe fore known and yof the manner of making,l constructing, and using the same, reference being had to the accompanying drawings, making part of this specification, in which-V VFigure l is avplan; Fig. 2, a longitudinal elevation; and Fig. 3 a longitudinal section taken at the linei (X X) of Fig. 1, and Fig. 4 a cross vertical section.

The same letters indicate like parts in all the figures.` y y In planing machines the boards to be pla-ned are moved forward to the rotating plane by means of two rollers, the lower' one turning in permanent, and the upper one in sliding boxes connected with springs or weighted levers to make pressure on the` board as it is moved forward, the lower z A p wheels, the weighted levers being provided r roller receiving motion from some part of the mechanism, and imparting it in a r`e' versed direction to the upper-one by means of two wheels the cogs of which are made of considerable length that the upper yroller may move up' and down to accommodate it' self to the unequal thi kness of the board or boards which are to pass between them but when it is necessaryto adapt theseto a great variety of thicknesses, then it bei comes necessary to' remove the wheels and substitute others of greater or less diameterj an operation which is attended with much* trouble and wasteA of time.

The object of the first part kof my inven# tion is to avoid this diiiculty, which I'effect by making the wheels, attached to the arbors of the two rollers, so small that their cogs shall notengage or mash into eachother, and communicate the motion from the one to the other by means of two auxiliary cog wheels, the arbors of which turn in links that keep them together in the proper pitch, the lower one being in like manner linked with the arbor of the lower roller, and the upper one with the wheel of the upper linked with one another by a series Vof-links that keep their cogs att-he proper pitch, it

will'be obvious thatthe distance between thetwo rollers may be varied to the extent of the length of all the links, and still any motion given to one of the rollers will be imparted to the other, andv in a reveresd direction, each of the auxiliary wheelssvibrat-ing around and at the same distance from the axis of the roller with which it is linked. And for the purpose of sustaining the auxiliary wheels and the links that connect them with the arbors of the rollers', one

. set of links extending from one ofthe roll- .ers to one of the auxiliary wheels, is made axis of the auxiliary Wheel, and this extension is then connected by anotherset` of to extend to a sho-rt distance beyond 4the links With the arbor of the other roller.V And the second ypart of my invention relates to the manner of connecting the weighted levers with the movable boxes ofthe'upper roller thatthe range of ratch or distance between the two rollers may be varied to an extent beyond the range of vibrationof the weighted levers: which objectV I' attain by connecting the movable boxes/y by means of links, chains, or other analogous device, with a kwindlass shaft provided with ratchet the shaft will be free to turn and permit the upper roller to be elevated to the height 3 required, and then by reng'agiing the lcatches,

,the weighted levers may agfain bear` down. y.the roller. f

In the accompanying drawingsV (d) represents the lower roller which runs in permanent boxesand which may receive motion inany'desired manner,y and4 is the upper roller, the journals ofwhich run yin boxes (c, c) that slidel in ways"` (el, d). These boxes are suspended by cords or chainsi (e, e)A that are attached to and wind on drums (f, f) on t-he arbor (g) provided with a ratchet wheelk (71,) so that by means of a spring pawlor catch (i) it can be held at any point desired. These cords or chains will hold the roller at anyheight required,

butV will admit vof its free movement upward, so that this is used simply as a means of setting the roller to any thickness of board desired, and yet give it the yrequiredplay up and. down. From each of the sliding boxes there is a link (j) extending downward and provided at the lowerv end'with a cord or chain (lc) attached to, and wound around a drum (Z) near each end of' an arbor (m), which is also provided Vat each end with a ratchet wheel The weighted or spring levers (0, o), are each provided with a hand or catch (29,) which takes into the teeth of the ratchet wheels, so t-hat by working the levers the arbor (m) can be turned to wind the cords on the drums (Z, Z) and draw down the roller to make pressure on the board passing` between the two. When it is desired to raise the upper roller higher than the play of the levers will admit, it is only necessary to throw up the hands or catches (p, p) and turn the'arbor (y) et top Y the upper roller. Two auxiliary cog wheels (s) and (t) are connectedwith each other at the proper pitch by means of two links (u, u) in which the axles of the wheels turn freely. The lower one of these wheels is in like manner connected, at

the proper pitch,.with the wheel (Q) by means of two links (o, o), and the upper one is also, and in like manner connected with the wheel (r) of the upper roller by links (fw, Each set of links being equal to the semi-diameter of the pitch line of the two Wheels which they connect together, it will be obvious that one of the wheels may move around the other, and still have the cogs mash properly, so that the upper roller can be moved up and down at .pleasure and yet retain the train of wheels in such relation with each other that any motion given to one of the rollers willbe transmitted through the train to the other roller which will thus be turned'in the opposite direction to coperate in moving forward the board between them. But it is necessary to sustain the auxiliary wheels in their proper position Vor else they would be carried down by their weight until one of them would engage with the wheels on the two rollers at the same time, which would ofcourse break the cogs beyond the axis of the auxiliary wheel (s),

and are there connected with the arbor of the roller (a.) by means of two links w) and the sum of the length of the projection of the links (fw, fw) b-eyond the axis of the wheel (t) and the length of the links m), 4should be equal to the sum of the length of the links that unite the three wheels (gb) (s) and (t), or nearly so. The links (fr, ai) being longer than either of those that connect the wheels, they will Valways form an angle with the line of the others, and therefore by their connections with the projections of the links (w, w), must hold the auxiliary wheels in their proper position relatively to those on the rollers.

` It will be obvious from the foregoing that' these improvements are applicable to other purposes as well as planing machines, as for instance to the feed and other rollers of all machinesin which the distance between the two rollers has to be varied,-as for example to the feed rollers of straw cutters which move the grain forward to the knife, and which should be adapted to a heavy or light charge of straw. The objects to which these improvements are applicable are so numerous that it is deemed unnecessary to enumerate them.

What we claim therefore as our invention and desire to secure by Letters Patent, is-

The method of communicating rotary motion, in the reverse direction, from one roller, arbor, or shaft to another by means of two auxiliary wheels whose axes are independent of the frame so connected with each other and with the wheels onthe axles of the rollers, &c., by jointed links as to admit of varying the distance between the two rollers, arbor, or shafts, at pleasure, substantially as described, and in combination with this we also claim'the diagonal link or links for retaining the auxiliary wheels in their proper position relatively to the wheels on the axles of the rollers.

CHARLES W. BROWN.

. WILLIAM E. CORNELL.

Witnesses: j l

. GARDINER G. HUBBARD,

WILLIAM A. SWIFT. 

